Indians For Guns

i whould like to know the general expenditure on

air guns and what are they.

what is the cost of maintenece of FBW 603 or walther lg300 or any other gun.

my wife shooting about 2000 pellets per month for last year with walther lg300 alutech so far maintenance zero.
fixed sights elevation base cost about INR 500, no other expenses. standard sights quite good, excellent accuracy, adjustment options, and unbeatable 600 !!!! shots per fill.